Effectiveness of RAPID and SSM Algorithms on Composite Scarf Repair

This work focuses on diagnostic methodologies for composite repair patch based on structural health monitoring (SHM) technology. Methodologies based on ultrasonic guided waves (GW) are developed and assessed for monitoring composite scarf repair with piezoelectric transducers. The effectiveness of the RAPID (reconstruction algorithm for probabilistic inspection of defects) algorithm was investigated for adhesively bonded composite patch repair. A composite scarf repair has been weakened by 4-point bending fatigue test and impacted after to generate a Barely Visible Damage (BVID). Both conventional RAPID technique, which requires baseline signals, and the Scaling Subtraction Method (SSM) were applied to detect damage in the bondline. The conventional method showed good performance for defect detection and localization whereas the SSM gives encouraging results for non-linear baseline-free RAPID.

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ULTRASONIC GUIDED WAVES FOR THE INSPECTION OF ADHESIVELY BONDED JOINTS

10.1063/1.2902659 ◽

2008 ◽

Cited By ~ 1

Author(s):

Padma Kumar Puthillath ◽

Fei Yan ◽

Clifford J. Lissenden ◽

Joseph L. Rose ◽

Donald O. Thompson ◽

...

Keyword(s):

Guided Waves ◽

Ultrasonic Guided Waves ◽

Bonded Joints ◽

Adhesively Bonded ◽

Adhesively Bonded Joints

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Damage Detection and Localization in Pipeline Using Sparse Estimation of Ultrasonic Guided Waves Signals

IFAC-PapersOnLine ◽

10.1016/j.ifacol.2018.09.688 ◽

2018 ◽

Vol 51 (24) ◽

pp. 941-948 ◽

Cited By ~ 1

Author(s):

Mahjoub El Mountassir ◽

Gilles Mourot ◽

Slah Yaacoubi ◽

Didier Maquin

Keyword(s):

Damage Detection ◽

Guided Waves ◽

Ultrasonic Guided Waves ◽

Sparse Estimation ◽

Detection And Localization

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Design, analysis and performance of adhesively bonded composite patch repair of cracked aluminum aircraft panels

Composite Structures ◽

10.1016/j.compstruct.2005.02.023 ◽

2005 ◽

Vol 71 (2) ◽

pp. 258-270 ◽

Cited By ~ 81

Author(s):

A. Chukwujekwu Okafor ◽

Navdeep Singh ◽

U.E. Enemuoh ◽

S.V. Rao

Keyword(s):

Design Analysis ◽

Patch Repair ◽

Adhesively Bonded ◽

Composite Patch ◽

Bonded Composite ◽

And Performance ◽

Aircraft Panels

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Influence of the oxide layer on the quality of bonding in adhesively bonded metallic structures by ultrasonic guided waves

International Journal of Adhesion and Adhesives ◽

10.1016/j.ijadhadh.2021.102981 ◽

2021 ◽

pp. 102981

Author(s):

S.Anand Kumar ◽

G. Sudheer

Keyword(s):

Oxide Layer ◽

Guided Waves ◽

Ultrasonic Guided Waves ◽

Adhesively Bonded ◽

Metallic Structures

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Influence and Compensation of Temperature Effects for Damage Detection and Localization in Aerospace Composites

Sensors ◽

10.3390/s20154153 ◽

2020 ◽

Vol 20 (15) ◽

pp. 4153

Author(s):

Guillermo Azuara ◽

Eduardo Barrera

Keyword(s):

Guided Waves ◽

Lamb Waves ◽

Impact Damage ◽

Reconstruction Algorithm ◽

Fiber Reinforced Polymers ◽

Carbon Fiber Reinforced Polymers ◽

Reinforced Polymers ◽

Operational Conditions ◽

Detection And Localization ◽

Non Destructive

Structural Health Monitoring (SHM) of Carbon Fiber Reinforced Polymers (CFRP) has become, recently, in a promising methodology for the field of Non-Destructive Inspection (NDI), specially based on Ultrasonic Guided Waves (UGW), particularly Lamb waves using Piezoelectric Transducers (PZT). However, the Environmental and Operational Conditions (EOC) perform an important role on the physical characteristics of the waves, mainly the temperature. Some of these effects are phase shifting, amplitude changes and time of flight (ToF) variations. In this paper, a compensation method for evaluating and compensating the effects of the temperature is carried out, performing a data-driven methodology to calculate the features from a dataset of typical temperature values obtained from a thermoset matrix pristine plate, with a transducer network attached. In addition, the methodology is tested on the same sample after an impact damage is carried out on it, using RAPID (Reconstruction Algorithm for Probabilistic Inspection of Damage) and its geometrical variant (RAPID-G) to calculate the location of the damage.

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The effectiveness of an adhesively bonded composite patch repair as applied to a transport aircraft lower with skin Ruschau, J.J. and Coate, J.E. Society for the Advancement of Material and Process Engineering, 1161 parkview Drive, P.O. Box 2459, Covina, CA 91722, Uf.S.A. 1996. 532–543 Conference: Materials and Process Challenges: Aging Systems. Affordability, Alternative Applications. Vol. 41-I, Anaheim, CA, U.S.A. 24–28 Mar. 1996

International Journal of Fatigue ◽

10.1016/s0142-1123(97)87826-7 ◽

1997 ◽

Vol 19 (8-9) ◽

pp. 660-660

Keyword(s):

Process Engineering ◽

Patch Repair ◽

Adhesively Bonded ◽

Transport Aircraft ◽

Composite Patch ◽

Bonded Composite

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Curing monitoring of bonded composite patch at constant temperature with electromechanical impedance and system parameters evaluation approach

Smart Materials and Structures ◽

10.1088/1361-665x/ac3d72 ◽

2021 ◽

Vol 31 (1) ◽

pp. 015039

Author(s):

Jianjian Zhu ◽

Jinshan Wen ◽

Chunyang Chen ◽

Xiao Liu ◽

Zifeng Lan ◽

...

Keyword(s):

Real Time ◽

Constant Temperature ◽

Patch Repair ◽

Curing Process ◽

Real Time Monitoring ◽

Electromechanical Impedance ◽

System Parameters ◽

Composite Patch ◽

Repair Patch ◽

Bonded Composite

Abstract As one of cost-effective maintenance methods, bonded composite patch repair has been receiving more and more attention in the engineering community since past decades. However, realizing real-time monitoring for curing process of bonded repair patch is difficult for most current techniques. In our work, a method based on electromechanical impedance and system parameters evaluation for structural health monitoring issues was developed, which could implement the online monitoring throughout whole curing process. Compared with the dynamic thermomechanical analysis results, the experiment data matches well. It demonstrates that the proposed approach can effectively monitor the curing process of composite repair patch at a constant temperature of 120 °C. Hence, the presented approach in this paper is expected to be a novel, robust, and real-time monitoring method for structural maintenance with the composite patch.

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